Semibleaching liquor for Kraft paper products

Details Semibleaching liquor for Kraft paper products Semibleaching liquor for Kraft paper products

1986-07-31

1988-03-15

Terapane, John F.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Treatment with particular chemical

162 90, 25218628, 25218643, D21C 300, D21C 302, C01B 15037

Patent

active

047311614

ABSTRACT:
A process of preparing a bleaching liquor with an improved stability involves mixing of magnesium ions and hydrogen peroxide prior to the addition of sodium hydroxide. The liquor may be used to bleach Kraft wood pulps, obtaining higher brightness levels.

REFERENCES:
patent: 3023140 (1962-02-01), Textor
patent: 3193445 (1965-07-01), Parker et al.
patent: 4120747 (1978-10-01), Sarge, III et al.
patent: 4222819 (1980-09-01), Fossum et al.
patent: 4599138 (1986-07-01), Lindahl
Kutney, G., 70th Annual CPPA Meeting, 1984 p. B175.

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